The title comes from the "Red hysteria" of the 1940s and 1950s: a witch hunt led by junior Senator Joseph McCarthy, where anyone could be accused of being a Communist and could be summoned before a Congressional committee. Those summoned were asked, "Are you now or have you ever been a member of the Communist Party?" Even appearing could ruin the professional and public reputation of the witness regardless of whether he or she cooperated, admitted membership in the Communist Party, and/or named additional people as suspected members. The committee referenced many times by the characters was the House Un-American Activities Committee (HUAC).
Starting with Season 8, Gary Burghoff is listed in the opening credits in an "Also Starring" capacity. He left the show prior to the beginning of the season, and as he was no longer a contracted member of the main cast, only appears through the midseason "Goodbye Radar" 2-part episode, though his guest star credit remains for the entire season. He appears briefly in an episode or two beforehand: his character Radar is on extended R&R. He does not appear in this episode at all, and is credit only.
One of the few times the camera moves to follow characters (Potter, Hawkeye and BJ) from outside in the compound through doors into the mess tent.
This shows that the mess tent set was part of the outdoor set at the Fox Ranch.
This shows that the mess tent set was part of the outdoor set at the Fox Ranch.